MongoDB interview questions part 44
MongoDB interview questions part 44
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Total Questions: 20
1. ________ tests to see if the mongo shell is connected to a mongos instance.
Correct Answer is : sh._checkMongos()
2. _______ reports on the active balancer lock, if it exists.
Correct Answer is : sh.getBalancerLockDetails()
3. Point out the wrong statement :
Correct Answer is : None of the mentioned
4. _________ reports on the last chunk migration.
Correct Answer is : sh._lastMigration()
5. _________ removes an association between a range shard keys and a shard tag.
Correct Answer is : sh.removeTagRange()
6. _________ disable balancing on a single collection in a sharded database.
Correct Answer is : sh.disableBalancing()
7. _______ activates the sharded collection balancer process if previously disabled using sh.disableBalancing().
Correct Answer is : sh.getBalancerHost()
8. ________ returns a boolean to report if the balancer is currently enabled.
Correct Answer is : sh.getBalancerState()
9. _______ enables the balancer and waits for balancing to start.
Correct Answer is : sh.startBalancer()
10. Point out the correct statement:
Correct Answer is : sh.deadForDLock() waits for a specified distributed sharded cluster lock
11. _________ waits for a change in ping state from one of the mongos in the sharded cluster.
Correct Answer is : sh.waitForPingChange()
12. _______ forces an update to the cluster metadata cached by a mongos.
Correct Answer is : flushRouterConfig
13. Point out the wrong statement :
Correct Answer is : none of the mentioned
14. Which of the following command that validates index on shard key ?
Correct Answer is : checkShardingIndex
15. Which of the following command is used to determine split points ?
Correct Answer is : splitVector
16. You can only issue listShards against the ________ database.
Correct Answer is : admin
17. _________ is an internal command that supports the sharding functionality.
Correct Answer is : getShardMap
18. ________ command verifies that a process is a mongos.
Correct Answer is : isdbgrid
19. Split empty chunks in your collection by manually performing the ______ command on chunks.
Correct Answer is : split
20. Point out the correct statement:
Correct Answer is : Pre-splitting the chunk ranges in an empty sharded collection allows clients to insert data into an already partitioned collection
